For background on how the map was made (and its flaws), see the relevant blog entry.
|Hoaren||Very rare: Offaly.|
|Ó h-Odhráin||Horan: measctha le Ó h-Annráin & Ó h-Ughróin, q.v. Tá na sloinnte thuas bunaithe ar an ainm Odhar a chiallaíonn dath buí ar chraiceann.|
DEDs where Horan and a second surname are found together